Mackie DL806 Reference Guide - Page 57
High-Mid Peaking - Band 3, High Shelving - Band 4, Frequency
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Mackie DL806 and DL1608 Reference Guide High-Mid Peaking - Band 3 The high-mid EQ provides up to 15 dB of boost or cut from 20 Hz to 20 kHz. Midrange EQ is often thought of as the most dynamic because the frequencies that define any particular sound are almost always found within this range. For example, the female vocal range as well as the fundamentals and harmonics of many higher-timbred instruments. Gain (+) Frequency (-) Frequency (+) Gain (-) High Shelving - Band 4 The high EQ provides up to 15 dB of boost or cut from 20 Hz to 20 kHz. Use it to add sizzle to cymbals, an overall sense of transparency, or an edge to keyboards, vocals, guitar and bacon frying. Turn it down a little to reduce sibilance or harsh treble. Gain (+) Frequency (-) Frequency (+) Gain (-) Although the Q control does adjust the bandwidth of a filter, the Q value itself is dimensionless; it has no unit of measurement. Some equalizers use the fractional bandwidth of the filter, measured in octaves, to express this parameter. The two parameters are inversely related; a high Q value corresponds to a small fractional bandwidth. The following table lists some equivalent Q and fractional bandwidth values. Q 0.7 1.414 2.145 BW (oct) 2 1 2/3 Q 2.871 4.318 15 BW (oct) 1/2 1/3 1/10 57